3 * Copyright 2006 Free Software Foundation, Inc.
5 * This file is part of GNU Radio
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
25 class gr_squelch_base_ff : public gr_block
28 enum { ST_MUTED, ST_ATTACK, ST_UNMUTED, ST_DECAY } d_state;
31 gr_squelch_base_ff(const char *name, int ramp, bool gate);
33 int ramp() const { return d_ramp; }
34 void set_ramp(int ramp) { d_ramp = ramp; }
35 bool gate() const { return d_gate; }
36 void set_gate(bool gate) { d_gate = gate; }
37 bool unmuted() const { return (d_state == ST_UNMUTED || d_state == ST_ATTACK); }
39 virtual std::vector<float> squelch_range() const = 0;